Rotational motion of dusty structures in glow discharge in longitudinal magnetic field
- 29 December 2006
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review E
- Vol. 74 (6), 066403
- https://doi.org/10.1103/physreve.74.066403
Abstract
The investigation of dust structure formed in glow discharge in an external longitudinal magnetic field with induction up to applied is presented in this work. The dust structure starts to rotate in the magnetic field. The angular-velocity magnitude is one to two orders larger than one in other discharge types. Its dependence on the magnetic field is nonmonotonic. The rotation direction inverses with an increase of the magnetic induction value up to a certain magnitude . In close range of induction around and under certain conditions the rotation of the upper and lower parts of the structure in the opposite direction is observed. Rotation is caused by the ion-drag force. The inversion of rotation direction relates with the change of plasma flows in the area of their formation in stratum with the magnetic field applied. The effect of ion flows was investigated in two additional experiments on the observation of structure rotation onset and on gravity-driven probing of stratum. The angular-velocity unhomogeniety allowed us to investigate shearing and to observe melting of the dust crystal. The correlation functions approach showed the occurrence of structure transformation and its phase transition of the meltinglike type in the magnetic field.
Keywords
This publication has 33 references indexed in Scilit:
- On the possibility of phase transitions in dusty plasma structures in a glow discharge under the action of a magnetic fieldOptics and Spectroscopy, 2006
- The onset of rotational motion of dusty plasma structures in strata of a glow discharge in a magnetic fieldOptics and Spectroscopy, 2006
- The Effect of a Longitudinal Magnetic Field on the Plasma–Dust Structures in Strata in a Glow DischargeOptics and Spectroscopy, 2005
- On the hypothesis of gas rotation in the magnetomechanical effectOptics and Spectroscopy, 2004
- Complex plasmas: III. Experiments on strong coupling and long-range correlationsPlasma Physics Reports, 2003
- Complex plasmas: II. Elementary processes in complex plasmasPlasma Physics Reports, 2003
- Complex plasmas: I. complex plasmas as unusual state of matterPlasma Physics Reports, 2002
- Study of the magnetomechanical effect in a gas discharge with the use of dust particlesOptics and Spectroscopy, 2002
- The effect of the gas temperature gradient on dust structures in a glow-discharge plasmaJournal of Experimental and Theoretical Physics, 2001
- Ordered structures in a nonideal dusty glow-discharge plasmaJournal of Experimental and Theoretical Physics, 1997